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Wednesday, 04 November 2026
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Physics Past Questions and Answers

Jamb 2012 Physics Questions

Question 106:
The force on a current carrying conductor in a magnetic field is greatest when the
  • A Conductor makes an angle of 60° with the field
  • B Force is idependent of the angles between the fields and the conductor
  • C Conductor is parallel with the field
  • D Conductor is at right angle with the field
View Answer & Explanation
Question 107:
A transistor function mainly as a
  • A Switch and amplifier
  • B Rectifier and an amplifier
  • C Charge storer and an amplifier
  • D Charge storer and a switch
View Answer & Explanation
Question 108:
Energy losses through eddy currents are reduced by using
  • A Low resistance wires
  • B Insulated soft iron wires
  • C Few turns of wires
  • D High resistance wires
View Answer & Explanation
Question 109:
A capacitor of 20 x 10-12F and an inductor are joined in series. The value of the inductance that will give the circuit a resonance frequency of 200kHz is
  • A I/16 H
  • B I/8 H
  • C I/64 H
  • D I/32 H
View Answer & Explanation
Question 110:
The magnetic force on a charged particle moving with velocity v is
  • A Proportional to both the magnitude of the charge and the velocity v
  • B Independent of the magnitude of the charge
  • C Proportional to the velocity v only
  • D Proportional to the magnitude of the charge only
View Answer & Explanation